neti pot
noun
\ ˈne-tē-
\
\
Medical Definition of neti pot
: a usually plastic or ceramic container that resembles a small teapot and has a spout which is inserted into a nostril to direct a cleansing saline solution into the nasal passages
Neti pots—those odd teapotlike vessels used to wash out the nasal passage—have won legions of fans who rely on them for relief from allergies, congestion and colds.— Tara Parker-Pope, The New York Times, 4 Sept. 2012